As election fever hits the school, everybody seems to be running for class president except for Polly who is off ill. When Nancy is made to go round and see how Polly is, she lets slip about the elections and Polly forces herself well again in order to stand for president, forcing the rest of the competition out of the race and winning by default. However when the kids grow tired of Polly's forceful ways, they lead a revolt to force her out of power.